Siemens Aktiengesellschaft

Siemens Aktiengesellschaft-muenchen

Andreas Bode

Edwin Gobrecht

Martin Hempl

Disclosed is a method for storing process signals of a plant or technical installation. A compression method is adapted for a current operating state of the plant is applied to the set of process signals in accordance with the current operating state of the plant and a compressed process signal set which is determined during the application of the compression method is stored.

Method for storing plant process signals

A method for determining an approximate value for a parameter characteristic of the fatigue state of a component as a result of a time-varying stress to which it is subjected by means of a number of load cycles should, itself, during comparatively lengthy stress cycles, enable a prognosis concerning the current fatigue state of the component, this prognosis being, in particular, adapted to the needs and suited for the real-time determination of maintenance intervals. To this end, in addition to optionally already fully completed load cycles, a first partially completed load cycle is also taken into consideration during the determination of the parameter, whereby temporary stress values for phases that have not yet been run through of the partially completed load cycle are, together with a predetermined fixed value, taken into consideration.

Method for determining a parameter characteristic of the fatigue state of a part

The invention relates to a method for monitoring the condition of turbines using their coasting time. The aim of the invention is to ensure that the monitoring process is as sensitive as possible with low resource requirements. To achieve this, the measured coasting time (t) is corrected by a correction member, in which the temperature of the medium (T) in the turbine that has likewise been measured, is taken into consideration and compared with a reference value.

Method for monitoring the state of turbines based on their coasting time

With the method in accordance with the invention at least one monitoring limit value is defined in advance for an operating variable to be monitored of the technical device. During the operation of the technical device the current value of the operating variable to be monitored is recorded at least twice at least within a finite time interval, and within the time interval a current monitoring reference value is determined by means of an interpolation between the monitoring limit value and the current value of the operating variable to be monitored. The monitoring of the operating variable is possible immediately after the technical device has gone into operation for the first time and that the quality of the monitoring is refined as a kind of learning process as operation proceeds.

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Höchstadt, Germany

Andreas Bode